xref: /qemu/hw/remote/machine.c (revision d0fb9657)
1 /*
2  * Machine for remote device
3  *
4  *  This machine type is used by the remote device process in multi-process
5  *  QEMU. QEMU device models depend on parent busses, interrupt controllers,
6  *  memory regions, etc. The remote machine type offers this environment so
7  *  that QEMU device models can be used as remote devices.
8  *
9  * Copyright © 2018, 2021 Oracle and/or its affiliates.
10  *
11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
12  * See the COPYING file in the top-level directory.
13  *
14  */
15 
16 #include "qemu/osdep.h"
17 #include "qemu-common.h"
18 
19 #include "hw/remote/machine.h"
20 #include "exec/memory.h"
21 #include "qapi/error.h"
22 #include "hw/pci/pci_host.h"
23 #include "hw/remote/iohub.h"
24 
25 static void remote_machine_init(MachineState *machine)
26 {
27     MemoryRegion *system_memory, *system_io, *pci_memory;
28     RemoteMachineState *s = REMOTE_MACHINE(machine);
29     RemotePCIHost *rem_host;
30     PCIHostState *pci_host;
31 
32     system_memory = get_system_memory();
33     system_io = get_system_io();
34 
35     pci_memory = g_new(MemoryRegion, 1);
36     memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);
37 
38     rem_host = REMOTE_PCIHOST(qdev_new(TYPE_REMOTE_PCIHOST));
39 
40     rem_host->mr_pci_mem = pci_memory;
41     rem_host->mr_sys_mem = system_memory;
42     rem_host->mr_sys_io = system_io;
43 
44     s->host = rem_host;
45 
46     object_property_add_child(OBJECT(s), "remote-pcihost", OBJECT(rem_host));
47     memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1);
48 
49     qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal);
50 
51     pci_host = PCI_HOST_BRIDGE(rem_host);
52 
53     remote_iohub_init(&s->iohub);
54 
55     pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, remote_iohub_map_irq,
56                  &s->iohub, REMOTE_IOHUB_NB_PIRQS);
57 }
58 
59 static void remote_machine_class_init(ObjectClass *oc, void *data)
60 {
61     MachineClass *mc = MACHINE_CLASS(oc);
62 
63     mc->init = remote_machine_init;
64     mc->desc = "Experimental remote machine";
65 }
66 
67 static const TypeInfo remote_machine = {
68     .name = TYPE_REMOTE_MACHINE,
69     .parent = TYPE_MACHINE,
70     .instance_size = sizeof(RemoteMachineState),
71     .class_init = remote_machine_class_init,
72 };
73 
74 static void remote_machine_register_types(void)
75 {
76     type_register_static(&remote_machine);
77 }
78 
79 type_init(remote_machine_register_types);
80